CVE-2011-0656: Microsoft Office

High severity, CVSS 9.3. EPSS: 29.6% chance of exploitation in the next 30 days.

Microsoft PowerPoint 2002 SP3, 2003 SP3, 2007 SP2, and 2010; Office 2004, 2008, and 2011 for Mac; Open XML File Format Converter for Mac; Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2; PowerPoint Viewer; PowerPoint Viewer 2007 SP2; and PowerPoint Web App do not properly validate PersistDirectoryEntry records in PowerPoint documents, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a Slide with a malformed record, which triggers an exception and later use of an unspecified method, aka "Persist Directory RCE Vulnerability."

Affected products

• Microsoft Office: version 2004 only; version 2008 only; version 2011 only
• Microsoft Office Compatibility Pack: version 2007 only
• Microsoft Office PowerPoint Viewer: any version
• Microsoft Open XML File Format Converter: any version
• Microsoft PowerPoint: version 2002 only; version 2003 only; version 2007 only; version 2010 only
• Microsoft PowerPoint Viewer: version 2007 only
• Microsoft PowerPoint Web App: any version

Published 2011-04-13. Last modified 2026-06-16.